Federal Register / Vol. 75, No. 57 / Thursday, March 25, 2010 / Proposed Rules 14379 

(LPC STG1 blade), part numbers (P/Ns) 

1B6531, 1B6231–001, or 1A9031–001 (LPC 

STG1 blade set P/Ns 1B6521, 1B6221–001, 

and 1A9721–001), with a cutback leading 

edge, installed. These engines are installed 

on, but not limited to, Boeing 757 airplanes. 

Unsafe Condition 

(d) This AD results from reports from PW 

that fan blade leading edge erosion can result 

in a fan thrust deterioration mode (FTDM) 

condition, which reduces the engine’s 

capability of producing full rated take-off 

thrust. We are issuing this AD to prevent loss 

of engine thrust from an FTDM condition, 

which could result in an inability to maintain 

safe flight. 

Compliance 

(e) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified unless the 

actions have already been done. 

Restoring the Fan Blade Leading Edge 

Contour 

(f) Within 500 cycles-in-service after the 

effective date of this AD, restore the fan blade 

leading edge contour using one of the 

following: 

(1) For engines installed on the airplane, 

use the Accomplishment Instructions, For 

Engines Installed on Aircraft, paragraphs 1. 

through 1.T. of PW Alert Service Bulletin 

(ASB) PW2000 A72–729, Revision 1, dated 

December 8, 2009. 

(2) For engines that are not installed on the 

airplane, use the Accomplishment 

Instructions, For Engines Not Installed on 

Aircraft, paragraphs 1. through 1.S. of PW 

ASB PW2000 A72–729, Revision 1, dated 

December 8, 2009. 

(g) Thereafter, repeat paragraphs (f)(1) or 

(f)(2) of this AD, within intervals of 1,000 

cycles-since-last repair. 

Alternative Methods of Compliance 

(h) Pratt & Whitney PW2037, PW2040, 

PW2240, PW2337 Turbofan Engine Manual, 

Part No. 1A6231, Chapter/Section 72–31–12, 

Repair 14, is an approved alternative method 

of compliance to paragraphs (f)(1) and (f)(2) 

of this AD. 

(i) Boeing 757 Airplane Flight Manual 

Document D631N002, Appendix 24, 

(Performance For Operation Of PW2000 

Series Engines With Cutback Fan Blades 

Installed), is an approved alternative method 

of compliance to paragraphs (f)(1) and (f)(2) 

and (g) of this AD. 

(j) The Manager, Engine Certification 

Office, has the authority to approve 

alternative methods of compliance for this 

AD if requested using the procedures found 

in 14 CFR 39.19. 

Related Information 

(k) Contact Mark Riley, Aerospace 

Engineer, Engine Certification Office, FAA, 

Engine and Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 

01803; e-mail: mark.riley@faa.gov; telephone 

(781) 238–7758, fax (781) 238–7199, for more 

information about this AD. 

(l) Pratt & Whitney ASB PW2000 A72–729, 

Revision 1, dated December 8, 2009, pertains 

to the subject of this AD. Contact Pratt & 

Whitney, 400 Main St., East Hartford, CT 

06108; telephone (860) 565–8770; fax (860) 

565–4503, for a copy of this service 

information. 

Issued in Burlington, Massachusetts, on 

March 18, 2010. 

Francis A. Favara, 

Manager, Engine and Propeller Directorate, 

Aircraft Certification Service. 

[FR Doc. 2010–6583 Filed 3–24–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0301; Directorate 

Identifier 2009–NE–22–AD] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG (RRD) 

Models Tay 620–15, Tay 650–15, and 

Tay 651–54 Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for the 

products listed above. This proposed 

AD results from mandatory continuing 

airworthiness information (MCAI) 

issued by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as: Following a review of 

operational data of the Tay 651–54 

engine, it has been found that the actual 

stress levels in the Tay 651–54 engine 

High Pressure Compressor (HPC) stages 

1, 3, 6, 7 and 12 discs were higher than 

those originally assumed and therefore 

the approved lives needed to be 

reduced. 

We are proposing this AD to prevent 

HPC stages 1, 3, 6, 7, and 12 discs from 

exceeding the approved reduced life 

limits, which could result in an 

uncontained failure of a disc and 

damage to the airplane. 

DATES: We must receive comments on 

this proposed AD by April 26, 2010. 

ADDRESSES: You may send comments by 

any of the following methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov and follow 

the instructions for sending your 

comments electronically. 

• Mail: Docket Management Facility, 

U.S. Department of Transportation, 1200 

New Jersey Avenue, SE., West Building 

Ground Floor, Room W12–140, 

Washington, DC 20590–0001. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

• Fax: (202) 493–2251. 

Contact Rolls-Royce Deutschland Ltd 

& Co KG; Eschenweg 11, D–15827 

Blankenfelde-Mahlow, Germany; 

telephone +49 (0) 33 7086 1768; fax +49 

(0) 33 7086 3356 for the service 

information identified in this proposed 

AD. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Operations office between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Operations 

office (telephone (800) 647–5527) is the 

same as the Mail address provided in 

the ADDRESSES section. Comments will 

be available in the AD docket shortly 

after receipt. 

FOR FURTHER INFORMATION CONTACT: Tara 

Chaidez, Aerospace Engineer, Engine 

Certification Office, FAA, Engine and 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

e-mail: tara.chaidez@faa.gov; telephone 

(781) 238–7773; fax (781) 238–7199. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD. Send your comments 

to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2010–0301; Directorate Identifier 

2009–NE–22–AD’’ at the beginning of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD. We will 

consider all comments received by the 

closing date and may amend this 

proposed AD based on those comments. 

We will post all comments we 

receive, without change, to http:// 

www.regulations.gov, including any 

personal information you provide. We 

will also post a report summarizing each 

substantive verbal contact with FAA 

personnel concerning this proposed AD. 

Using the search function of the Web 

site, anyone can find and read the 

comments in any of our dockets, 

including, if provided, the name of the 

individual who sent the comment (or 

signed the comment on behalf of an 

association, business, labor union, etc.). 

You may review the DOT’s complete 

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14380 Federal Register / Vol. 75, No. 57 / Thursday, March 25, 2010 / Proposed Rules 

Privacy Act Statement in the Federal 

Register published on April 11, 2000 

(65 FR 19477–78). 

Discussion 

The European Aviation Safety Agency 

(EASA), which is the Technical Agent 

for the Member States of the European 

Community, has issued EASA 

Airworthiness Directive 2009–0092, 

dated April 17, 2009 (referred to after 

this as ‘‘the MCAI’’), to correct an unsafe 

condition for the specified products. 

The MCAI states: 

Following a review of operational data of 

the Tay 651–54 engine, it has been found that 

the actual stress levels in the Tay 651–54 

engine High Pressure Compressor (HPC) 

stages 1, 3, 6, 7 and 12 discs were higher than 

those originally assumed and therefore the 

approved lives needed to be reduced. 

As Tay 651–54 service run HPC discs may 

be installed on Tay 620–15 and Tay 650–15 

engine models, it is necessary to reduce the 

maximum approved lives of the affected HPC 

disc serial numbers installed on Tay 620–15 

and Tay 650–15 engines as well. 

The approved lives of the affected HPC 

stages 1, 3, 6, 7 and 12 discs specified in this 

Airworthiness Directive supersede the 

approved lives given in the Time Limits 

Manuals, Chapter 05–10–01. 

Exceeding of the approved life limits could 

potentially result in non-contained disc 

failure. 

You may obtain further information 

by examining the MCAI in the AD 

docket. 

Relevant Service Information 

Rolls-Royce Deutschland Ltd & Co KG 

has issued Alert Service Bulletin TAY– 

72–A1740, dated February 11, 2009. The 

actions described in this service 

information are intended to correct the 

unsafe condition identified in the 

MCAI. 

FAA’s Determination and Requirements 

of This Proposed AD 

This product has been approved by 

the aviation authority of Germany, and 

is approved for operation in the United 

States. Pursuant to our bilateral 

agreement with Germany, they have 

notified us of the unsafe condition 

described in the MCAI and service 

information referenced above. We are 

issuing this AD because we evaluated 

all information provided by EASA, and 

determined the unsafe condition exists 

and is likely to exist or develop on other 

products of the same type design. 

Costs of Compliance 

Based on the service information, we 

estimate that this proposed AD would 

affect about 10 products of U.S. registry. 

We also estimate that it would take 

about 1 work-hour per product to 

comply with this proposed AD. The 

average labor rate is $85 per work-hour. 

Required parts would cost about 

$100,000 per product. Based on these 

figures, we estimate the cost of the 

proposed AD on U.S. operators to be 

$1,000,850. 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. ‘‘Subtitle VII: 

Aviation Programs,’’ describes in more 

detail the scope of the Agency’s 

authority. 

We are issuing this rulemaking under 

the authority described in ‘‘Subtitle VII, 

Part A, Subpart III, Section 44701: 

General requirements.’’ Under that 

section, Congress charges the FAA with 

promoting safe flight of civil aircraft in 

air commerce by prescribing regulations 

for practices, methods, and procedures 

the Administrator finds necessary for 

safety in air commerce. This regulation 

is within the scope of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

We determined that this proposed AD 

would not have federalism implications 

under Executive Order 13132. This 

proposed AD would not have a 

substantial direct effect on the States, on 

the relationship between the national 

Government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify this proposed regulation: 

1. Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866; 

2. Is not a ‘‘significant rule’’ under the 

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979); and 

3. Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

We prepared a regulatory evaluation 

of the estimated costs to comply with 

this proposed AD and placed it in the 

AD docket. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 14 CFR part 

39 as follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

2. The FAA amends § 39.13 by adding 

the following new AD: 

Rolls-Royce Deutschland Ltd & Co KG 

(Formerly Rolls-Royce plc): Docket No. 

FAA–2010–0301; Directorate Identifier 

2009–NE–22–AD. 

Comments Due Date 

(a) We must receive comments by April 26, 

2010. 

Affected Airworthiness Directives (ADs) 

(b) None. 

Applicability 

(c) This AD applies to Rolls-Royce 

Deutschland Ltd & Co KG (RRD) models Tay 

620–15, Tay 650–15, and Tay 651–54 

turbofan engines. These engines are installed 

on, but not limited to, Fokker F28 Mark 0070 

and Mark 0100 airplanes and Boeing 727 

series airplanes. 

Reason 

(d) Following a review of operational data 

of the Tay 651–54 engine, it has been found 

that the actual stress levels in the Tay 651– 

54 engine High Pressure Compressor (HPC) 

stages 1, 3, 6, 7 and 12 discs were higher than 

those originally assumed and therefore the 

approved lives needed to be reduced. We are 

issuing this AD to prevent HPC stages 1, 3, 

6, 7, and 12 discs from exceeding the 

approved reduced life limits, which could 

result in an uncontained failure of a disc and 

damage to the airplane. 

Actions and Compliance 

(e) Unless already done, within 30 days 

after the effective date of this AD, amend the 

approved Airworthiness Limitation Section 

to incorporate the new, reduced life limits as 

follows: 

For Tay 651–54 Engines 

(1) The maximum approved lives (MAL) of 

the High Pressure Compressor (HPC) rotor 

discs are reduced to the MALs specified in 

the following Table 1 of this AD: 

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Federal Register / Vol. 75, No. 57 / Thursday, March 25, 2010 / Proposed Rules 14381 

TABLE 1—TAY 651–54 ENGINE REDUCED DISC MAL BY PART NUMBER

For Part Number the MAL is 

(i) HPC Stage 1 Disc ............................................................................ JR18049 .......................................................... 18,800 cycles. 

(ii) HPC Stage 3 Disc ............................................................................ JR18743 .......................................................... 18,100 cycles. 

(iii) HPC Stage 6 Disc ........................................................................... JR18748 .......................................................... 19,300 cycles. 

(iv) HPC Stage 7 Disc ........................................................................... JR17365 .......................................................... 17,300 cycles. 

(v) HPC Stage 12 Disc ......................................................................... JR31928 .......................................................... 18,900 cycles. 

For Tay 620–15 and Tay 650–15 Engines 

(2) The MAL of certain High Pressure 

Compressor (HPC) rotor discs are reduced. 

The affected disc serial numbers and the 

reduced MAL are defined in Rolls-Royce 

Deutschland Non-Modification Service 

Bulletin TAY–72–A1740, dated February 11, 

2009. 

(3) Thereafter, except as provided in 

paragraph (f) of this AD, no alternative 

replacement times may be approved for these 

parts. 

Other FAA AD Provisions 

(f) Alternative Methods of Compliance 

(AMOCs): The Manager, Engine Certification 

Office, FAA, has the authority to approve 

AMOCs for this AD, if requested using the 

procedures found in 14 CFR 39.19. 

Related Information 

(g) Refer to MCAI EASA Airworthiness 

Directive 2009–0092, dated April 17, 2009, 

and Rolls-Royce Deutschland Ltd & Co KG 

Alert Service Bulletin TAY–72–A1740, dated 

February 11, 2009, for related information. 

Contact Rolls-Royce Deutschland Ltd & Co 

KG; Eschenweg 11, D–15827 BlankenfeldeMahlow, Germany; telephone +49 (0) 33 7086 

1768; fax +49 (0) 33 7086 3356, for a copy 

of this service information. 

(h) Contact Tara Chaidez, Aerospace 

Engineer, Engine Certification Office, FAA, 

Engine and Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 

01803; e-mail: tara.chaidez@faa.gov; 

telephone (781) 238–7773; fax (781) 238– 

7199, for more information about this AD. 

Issued in Burlington, Massachusetts, on 

March 18, 2010. 

Francis A. Favara, 

Manager, Engine and Propeller Directorate, 

Aircraft Certification Service. 

[FR Doc. 2010–6584 Filed 3–24–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2010–0070; Airspace 

Docket No. 10–ASO–14] 

Amendment of Class E Airspace; 

Mount Airy, NC 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: This action proposes to 

amend Class E Airspace at Mount Airy, 

NC, to accommodate the additional 

airspace needed for the Standard 

Instrument Approach Procedures 

(SIAPs) developed for Mount Airy-Surry 

County Airport. This action enhances 

the safety and airspace management of 

Instrument Flight Rules (IFR) operations 

at the airport. 

DATES: Comments must be received on 

or before May 10, 2010. 

ADDRESSES: Send comments on this rule 

to: U.S. Department of Transportation, 

Docket Operations, West Building 

Ground Floor, Room W12–140, 1200 

New Jersey Avenue, SE., Washington, 

DC 20590–0001; Telephone: 1–800– 

647–5527; Fax: 202–493–2251. You 

must identify the Docket Number FAA– 

2010–0070; Airspace Docket No. 10– 

ASO–14, at the beginning of your 

comments. You may also submit and 

review received comments through the 

Internet at 

http://www.regulations.gov. 

FOR FURTHER INFORMATION CONTACT: 

Melinda Giddens, Operations Support 

Group, Eastern Service Center, Federal 

Aviation Administration, P.O. Box 

20636, Atlanta, Georgia 30320; 

telephone (404) 305–5610. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

Interested persons are invited to 

comment on this rule by submitting 

such written data, views, or arguments, 

as they may desire. Comments that 

provide the factual basis supporting the 

views and suggestions presented are 

particularly helpful in developing 

reasoned regulatory decisions on the 

proposal. Comments are specifically 

invited on the overall regulatory, 

aeronautical, economic, environmental, 

and energy-related aspects of the 

proposal. 

Communications should identify both 

docket numbers (FAA Docket No. FAA– 

2010–0070; Airspace Docket No. 10– 

ASO–14) and be submitted in triplicate 

to the Docket Management System (see 

ADDRESSES section for address and 

phone number). You may also submit 

comments through the Internet at 

http://www.regulations.gov. 

Comments wishing the FAA to 

acknowledge receipt of their comments 

on this action must submit with those 

comments a self-addressed stamped 

postcard on which the following 

statement is made: ‘‘Comments to 

Docket No. FAA–2010–0070; Airspace 

Docket No. 10–ASO–14.’’ The postcard 

will be date/time stamped and returned 

to the commenter. 

All communications received before 

the specified closing date for comments 

will be considered before taking action 

on the proposed rule. The proposal 

contained in this notice may be changed 

in light of the comments received. A 

report summarizing each substantive 

public contact with FAA personnel 

concerned with this rulemaking will be 

filed in the docket. 

Availability of NPRMs 

An electronic copy of this document 

may be downloaded from and 

comments submitted through http:// 

www.regulations.gov. Recently 

published rulemaking documents can 

also be accessed through the FAA’s Web 

page at http://www.faa.gov/ 

airports_airtraffic/air_traffic/ 

publications/airspace_amendments/. 

You may review the public docket 

containing the proposal, any comments 

received, and any final disposition in 

person in the Dockets Office (see the 

ADDRESSES section for address and 

phone number) between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. An informal docket 

may also be examined during normal 

business hours at the office of the 

Eastern Service Center, Federal Aviation 

Administration, room 210, 1701 

Columbia Avenue, College Park, Georgia 

30337. 

Persons interested in being placed on 

a mailing list for future NPRM’s should 

contact the FAA’s Office of Rulemaking, 

(202) 267–9677, to request a copy of 

Advisory circular No. 11–2A, Notice of 

Proposed Rulemaking distribution 

System, which describes the application 

procedure. 

mstockstill on DSKH9S0YB1PROD with PROPOSALS